Question

The diameter of the wheel of a car is 77cm. How many revolutions will it make to travel 121km​

Answer 1

$\boxed{\red{\underbrace{\underline{QUESTION}}}}$

The diameter of the wheel of a car is 77cm. How many revolutions will it make to travel 121km .

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$\boxed{given\:,}$

Diameter of the wheel = 77 cm

$\therefore$ Radius of the wheel = $\frac{77}{2}$ cm

$\therefore$ Circumference of the wheel = $πd$ ( πd = 2πr )

$\implies$ circumference = $\frac{22}{7}\:×\:77$

$\implies$ circumference = 22 × 11

$\implies$ circumference = 242 cm / 2.4 m

$\because$ The car have to travel 121 km / 121000 m

$\therefore$ revolution of the wheel to complete the distance $\longrightarrow$

$\implies \frac{121000}{2.4} \\ \\ \implies \frac{1210000}{24} \\ \\ \implies \frac{605000}{12} \\ \\ \implies \frac{302500}{6} \\ \\ \implies \frac{151250}{3} \\ \\ \implies 50416.7$

$\therefore No.\:of \:revolution \:to \:complete\: the \:distance \\ = \\ 50416.7$

$\boxed{\boxed{MARK\:\: BRAINLIEST}}$

Answer 2

No.of revolution to complete the distance = 50416.7

Step-by-step explanation:

The diameter of the wheel of a car is 77cm. How many revolutions will it make to travel 121km.

Diameter of the wheel = 77 cm

therefore∴ Radius of the wheel = 77/2cm

therefore∴ Circumference of the wheel = πdπd ( πd = 2πr )

circumference = 22/7×77

⟹ circumference = 22 × 11

⟹ circumference = 242 cm / 2.4 m

∵ The car have to travel 121 km / 121000 m

∴ revolution of the wheel to complete the distance ⟶

⟹121000/2.4

⟹1210000/24

⟹605000/12

⟹302500/6

⟹151250/3

⟹50416.7

∴No.of revolution to complete the distance = 50416.7

Hope this helps you!!